Local Calling Guide
Area code/prefix search
Crofton, MD
1 2 >>
| NPA-NXX |
BLOCK |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 410-451
| A |
COTNMDCRDS0 |
9212 VERIZON MARYLAND, INC. |
238 |
|
|
|
| 410-721
| A |
COTNMDCRDS0 |
9212 VERIZON MARYLAND, INC. |
238 |
|
|
|
| 410-774
| A |
BLTOMDKHDS0 |
7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD |
238 |
|
|
|
| 410-774
| 0 |
|
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
2006-03-25 |
|
| 410-774
| 1 |
|
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
2006-03-25 |
|
| 410-774
| 2 |
|
4492 VDL, INC. DBA GLOBAL TELECOM BROKERS - MD |
238 |
|
2004-02-14 |
|
| 410-774
| 3 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
238 |
|
2019-04-30 |
|
| 410-774
| 4 |
|
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
2003-08-20 |
|
| 410-774
| 5 |
|
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
2005-02-11 |
|
| 410-774
| 6 |
|
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2010-02-22 |
|
| 410-774
| 7 |
|
9212 VERIZON MARYLAND, INC. |
238 |
|
2005-10-15 |
|
| 410-774
| 8 |
|
829J PAETEC ITEL, LLC |
238 |
|
2003-02-25 |
|
| 410-774
| 9 |
|
7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD |
238 |
|
|
|
| 443-292
| A |
BLTMMDSN6MD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
|
|
| 443-292
| 0 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
238 |
|
2004-03-29 |
|
| 443-292
| 1 |
|
7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD |
238 |
|
2006-07-31 |
|
| 443-292
| 2 |
|
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2011-10-14 |
|
| 443-292
| 3 |
|
829J PAETEC ITEL, LLC |
238 |
|
2007-10-03 |
|
| 443-292
| 4 |
|
318J COMCAST IP PHONE, LLC |
238 |
|
2005-03-10 |
|
| 443-292
| 5 |
|
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
2008-01-25 |
|
| 443-292
| 6 |
|
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2010-09-04 |
|
| 443-292
| 7 |
|
829J PAETEC ITEL, LLC |
238 |
|
2010-10-22 |
|
| 443-292
| 8 |
|
318J COMCAST IP PHONE, LLC |
238 |
|
2006-12-29 |
|
| 443-292
| 9 |
|
876D ONVOY, LLC - MD |
238 |
|
2012-06-15 |
|
| 443-302
| A |
|
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
|
|
| 443-302
| 0 |
|
145J TERRA NOVA TELECOM INC. |
238 |
|
2024-10-12 |
|
| 443-302
| 2 |
|
318J COMCAST IP PHONE, LLC |
238 |
|
2008-03-20 |
|
| 443-302
| 3 |
|
876D ONVOY, LLC - MD |
238 |
|
2021-05-21 |
|
| 443-302
| 6 |
|
7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD |
238 |
|
2008-10-01 |
|
| 443-302
| 7 |
|
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
2008-02-12 |
|
| 443-302
| 8 |
|
876D ONVOY, LLC - MD |
238 |
|
2021-05-21 |
|
| 443-302
| 9 |
|
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2008-12-11 |
|
| 443-332
| A |
|
829J PAETEC ITEL, LLC |
238 |
|
2025-04-01 |
|
| 443-332
| 0 |
|
829J PAETEC ITEL, LLC |
238 |
|
|
|
| 443-332
| 1 |
|
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2020-09-12 |
|
| 443-332
| 2 |
|
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2021-08-30 |
|
| 443-332
| 3 |
|
876D ONVOY, LLC - MD |
238 |
|
2024-03-03 |
|
| 443-332
| 4 |
|
829J PAETEC ITEL, LLC |
238 |
|
2002-07-12 |
|
| 443-332
| 5 |
|
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2021-08-30 |
|
| 443-332
| 6 |
|
829J PAETEC ITEL, LLC |
238 |
|
2006-03-28 |
|
| 443-332
| 7 |
|
876D ONVOY, LLC - MD |
238 |
|
2021-04-29 |
|
| 443-332
| 8 |
|
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2020-11-29 |
|
| 443-332
| 9 |
|
876D ONVOY, LLC - MD |
238 |
|
2021-04-29 |
|
| 443-584
| A |
|
829J PAETEC ITEL, LLC |
238 |
|
2025-04-01 |
|
| 443-584
| 0 |
|
624H ONVOY SPECTRUM, LLC |
238 |
|
2021-05-22 |
|
| 443-584
| 1 |
|
829J PAETEC ITEL, LLC |
238 |
|
|
|
| 443-584
| 2 |
|
145J TERRA NOVA TELECOM INC. |
238 |
|
2024-02-15 |
|
| 443-584
| 3 |
|
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2014-06-06 |
|
| 443-584
| 4 |
|
318J COMCAST IP PHONE, LLC |
238 |
|
2014-07-20 |
|
| 443-584
| 5 |
|
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2015-05-21 |
|
1 2 >>
Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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